<?xml version="1.0" encoding="utf-8"?>

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    Nokia Corporation - initial contribution.

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<!DOCTYPE task

  PUBLIC "-//OASIS//DTD DITA Task//EN" "task.dtd">

<task id="GUID-FD4BD57B-99EE-41AE-BAB6-C422CA3B1E51" xml:lang="en"><title>Enabling

MTP over USB using the Symbian USB Manager</title><shortdesc>This section describes the steps to enable MTP over USB using the

Symbian USB Manager.</shortdesc><prolog><metadata><keywords/></metadata></prolog><taskbody>

<context>       <p>The USB Manager provides functions to enable MTP over USB.</p> 

   </context>

<steps id="GUID-12E76F69-4DA0-4F58-8B02-68180F2576ED">

<step id="GUID-B66CE19F-A6A0-46BD-AE1F-D93B773858D6"><cmd>In the user application which requests USB services, create a USB

Manager session by using the RUsb::Connect() function.</cmd>

<info><p/></info>

</step>

<step id="GUID-6B178935-1C5F-496F-8EF2-10CCE25C1C61"><cmd>Call the function RUsb::TryStart() and pass the personality ID

of the USB Still Image Class to the method. For more information about Personality

ID, see <xref href="GUID-92976123-FA75-5B55-B86E-F7B404E762CF.dita">Discovering

details of USB personalities</xref></cmd>

</step>

<step id="GUID-B013CA86-3A98-445E-AC7A-D6DA31DD73B0"><cmd>The USB Manager automatically loads the USB Still Image Class Controller

which is a client of the MTP server. The Controller starts the MTP server

and asks it to load the USB MTP Transport plug-in.</cmd>

</step>

</steps>

<example><codeblock xml:space="preserve">RUsb usb;

TInt err = usb.Connect();

if( err != KErrNone)

   {

    // Error in connecting with the USB Manager

   }

// Find the personality that supports MTP USB SIC 

TInt personalityId(KErrNotFound);

RArray<TInt> personalityIds;

err = usb.GetPersonalityIds(personalityIds);

if ( err != KErrNone)

   {

   // Error handling

   }

TInt count = personalityIds.Count();    

for (TInt i(0); i < count; i++)

   {

   TBool supported(EFalse);

   err = usb.ClassSupported(personalityIds[i], KUsbMTPUsbSicClassControllerUID, supported);

   if (err != KErrNone)

      {

      // Error handling

      }

   if (supported)

      {

      personalityId = personalityIds[i];    

      break;

      }

   }

personalityIds.Close();

if (personalityId != KErrNotFound)

   {

   TRequestStatus status ;

   usb.TryStart(personalityId, status);

   User::WaitForRequest(status);

   if(status.Int() != KErrNone)

      {

       // Error in trying to start the MTP service

      }

    }

...

usb.Close();

</codeblock></example>